[9][10] Observations made in 1986, revealed the presence of a rotating gas cloud around 3C 275.1 with a diameter of more than 100 kiloparsecs (Kpc).

Based on results, it is found to be largest known, to surround a quasar and is likely remnants created by tidal interactions or material is accumulated via cooling flows originating from the cluster.

[11] A much detailed study published in 2024, showed the cloud to be a nebula, containing ionized gas tails that extends up to 170 kiloparsecs typical of Jellyfish galaxies.

[12] The nebula is described as having a conical shape with a bar-shaped extension that is located southwards from the nucleus[13] with an extended component having an X-ray emission of 7.6 x 1043 erg s-1.

[15][12] The quasar itself is paired with the nearby galaxy NGC 4651, due to the radio emitter alignment at the rear of the latter's outer galactic disk.